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Area Codes

Directory of U.S. area codes and international country calling codes.
directory of U.S. area codes by state plus cities within each area code. Also lists Canadian area codes by province or territory.
search by area code, state abbreviation, or city name.
features code lists, maps, and news to help you keep up with all the changes.
Area code lookup with maps by state or by code.
zip code and area code lookup and conversion database.
Information about North American area codes, featuring changes and historical data.
information about the original area codes from 1947, their evolution to the current state, and future developments including area code splits and overlays. Also features area code maps.
Neutral, third party administrator that works with the telecommunications industry in developing area code relief plans.
features government links for each state.